public static Response <string> ValidateName <TEntity>(this DbSet <TEntity> dbSet, string name, int?min = null, int?max = null)
where TEntity : class, IHasName
{
if (string.IsNullOrWhiteSpace(name))
{
return(Response.Failure <string>(Error.InvalidValue <IHasName>(x => x.Name, "Name is required")));
}
name = name.TrimStart().TrimEnd();
if (min != null && name.Length < min)
{
return(Response.Failure <string>(Error.InvalidValue <IHasName>(x => x.Name, $"Name must be at least {min} characters")));
}
if (max != null && name.Length > max)
{
return(Response.Failure <string>(Error.InvalidValue <IHasName>(x => x.Name, $"Name can be no more than {max} characters")));
}
var matchedByName = dbSet.AsNoTracking().FirstOrDefault(x => EF.Functions.Like(x.Name, name));
if (matchedByName != null)
{
return(Response.Failure <string>(DomainErrors.Duplicate <IHasName>(x => x.Name, name)));
}
return(Response.Success(name));
}
public static Response <string> ValidateNamedEntityCreateCommand <TEntity>(this DbSet <TEntity> dbSet, IHasName command, int minimumLength = 4)
where TEntity : class, IHasName, IServerEntity
{
if (string.IsNullOrWhiteSpace(command.Name))
{
return(Response.Failure <string>(Error.RequiredValue <IHasName>(x => x.Name)));
}
var requestedName = command.Name.TrimStart().TrimEnd();
if (requestedName.Length < minimumLength)
{
return(Response.Failure <string>(Error.InvalidValue <IHasName>(x => x.Name, $"Name must be at least {minimumLength} characters")));
}
var matchedByName = dbSet.AsNoTracking().FirstOrDefault(x =>
EF.Functions.Like(x.Name, command.Name.TrimStart().TrimEnd()) &&
x.EntityState != EntityState.Deleted);
return(matchedByName != null
? Response.Failure <string>(DomainErrors.Duplicate <IHasName>(x => x.Name, command.Name))
: Response.Success(requestedName));
}
